Cops say video shows parents adding drug to milkshake for 13-year-old daughter in order to sexually abuse her: 'Depraved maniacs'

 A couple is accused of sexually abusing their daughter for years after police said they found a video of them adding cough syrup to a milkshake and indicating they usually add oxycodone.

The horrific accusations were made by their 13-year-old daughter after she was found wandering the highway near San Antonio, Texas.

39-year-old Christopher Thomley and his wife 32-year-old Ashley Thomley reported their daughter missing on Tuesday.

People at an Amazon Fulfillment Center in Schertz called police when they saw a young girl crossing Interstate 35 alone. The girl was very small and appeared to be much younger than 13 years old. Police said the girl told them she had been regularly abused for as long as six years and that some of the abuse had been recorded.

When investigators searched the couple's home, they seized computer and camera equipment and found a damning video.

"During this video that we saw, Christopher actually commented, 'well shoot, we forgot the oxycodone,' so that tells me that not only was this half a bottle of cough suppressant on this tiny little body enough for these depraved maniacs, they were lamenting the fact that they forgot the other prescription medication that they were going to give her as part of this cocktail," said Sheriff Javier Salazar to the media.

Salazar said that the girl had been homeschooled. Police did not find video evidence of the abuse, but they suspect that there might be other victims of the alleged abuse.

The Bexar County Sheriff's Office arrested the couple and charged Christopher Thomley with continuous child abuse and Ashley Thomley with child endangerment.

The girl is currently with Child Protective Services.

Here's a local news video about the horrific accusations:

'The prison that she lived in her entire life' | Two arrested after child makes outcry of sexual abu